Eriophyes dinus

Eriophyidae

Aceria

Nyssa sylvatica

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An Illustrated Guide to Plant Abnormalities Caused by Eriophyid Mites in North America

Aceria dina

Eriophyes sp.

Nyssa

A narrow infolding of the leaf margin upon the upper surface, dark brown when dry, elegantly scalloped.

Key to American Insect Galls

Eriophyes dinus

Hosts: Nyssa sylvatica

Two species of Eriophyes infest tupelo. Eriophyes dinus is responsible for the irregularities of the leaf margin, which consist of thickened rolled edges with one or two windings, and the transforming of the leaf tip into a twisted or spiral tube. At first the colonized areas are the same color as the rest of the leaf, later becoming reddish, and finally brown. The thickness of the leaf roll is variable, and the whole length of the leaf margin may become infested, producing an attractive crinkly, wavy leaf. Rolled edge leaf sometimes has beadlike galls colonized by beadlike galls colonized by Eriophyes nyssae. These galls, which also occur on the upper surface of the leaf, are small and may be solitary or coalesced. 

The different between Aceria dina and Phylloxerina nyssae can be seen clearly in the first picture of [this observation](https://www.inaturalist.org/observations/83246314). Aceria dina is the densely curled gall found in various places around the edge of the leaf, of the same color as the leaf. P nyssae is the section where the leaf is more deeply incised to form one smooth yellowish fold.

Gallformers ID Notes